FR2473415A1 - COMPOUND STRUCTURES BASED ON RIGID POLYOLEFIN PLATES COATED WITH FLEXIBLE POLYOLEFIN LAYERS AND PROCESS FOR PREPARING THE SAME - Google Patents

COMPOUND STRUCTURES BASED ON RIGID POLYOLEFIN PLATES COATED WITH FLEXIBLE POLYOLEFIN LAYERS AND PROCESS FOR PREPARING THE SAME Download PDF

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Publication number
FR2473415A1
FR2473415A1 FR8100221A FR8100221A FR2473415A1 FR 2473415 A1 FR2473415 A1 FR 2473415A1 FR 8100221 A FR8100221 A FR 8100221A FR 8100221 A FR8100221 A FR 8100221A FR 2473415 A1 FR2473415 A1 FR 2473415A1
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Prior art keywords
polyolefin
layers
plate
flexible
aforementioned
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Granted
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FR8100221A
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French (fr)
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FR2473415B1 (en
Inventor
Annibale Vezzoli
Valerio Pessina
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Montedison SpA
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Montedison SpA
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/065—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of foam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/022—Non-woven fabric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/024—Woven fabric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/24—All layers being polymeric
    • B32B2250/242—All polymers belonging to those covered by group B32B27/32
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0253—Polyolefin fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2266/00—Composition of foam
    • B32B2266/02—Organic
    • B32B2266/0214—Materials belonging to B32B27/00
    • B32B2266/025—Polyolefin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2305/00—Condition, form or state of the layers or laminate
    • B32B2305/02—Cellular or porous
    • B32B2305/022—Foam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2305/00—Condition, form or state of the layers or laminate
    • B32B2305/10—Fibres of continuous length
    • B32B2305/18—Fabrics, textiles
    • B32B2305/188—Woven fabrics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2305/00—Condition, form or state of the layers or laminate
    • B32B2305/10—Fibres of continuous length
    • B32B2305/20—Fibres of continuous length in the form of a non-woven mat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2323/00—Polyalkenes
    • B32B2323/04—Polyethylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2323/00—Polyalkenes
    • B32B2323/10—Polypropylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2605/00—Vehicles
    • B32B2605/003—Interior finishings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2605/00—Vehicles
    • B32B2605/08—Cars

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Laminated Bodies (AREA)
  • Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)

Abstract

La présente invention concerne des structures composées en polyoléfine. Selon l'invention, elles se composent d'un support rigide formé d'une plaque en polyoléfine de 0,5-4 mm d'épaisseur, recouverte sur l'une ou ses deux faces, sans interposition d'un adhésif, d'une ou plusieurs couches flexibles à base de polyoléfine. L'invention s'applique notamment aux revêtements pour l'industrie automobile.The present invention relates to structures made from polyolefin. According to the invention, they consist of a rigid support formed of a polyolefin plate 0.5-4 mm thick, covered on one or both sides, without the interposition of an adhesive, of one or more flexible polyolefin-based layers. The invention applies in particular to coatings for the automotive industry.

Description

La présente invention concerne des structures à base de plaques deThe present invention relates to structures based on

polyoléfine rigide revêtues de couches de polyoléfine flexible ainsi qu'au procédé pour obtenir ces  rigid polyolefin coated with flexible polyolefin layers and the process for obtaining these

structures composées.composite structures.

Plus particulièrement, la présente invention se rapporte à la préparation de structures composées et autonomes ou auto-porteuses, adaptées à une utilisation  More particularly, the present invention relates to the preparation of composite structures and autonomous or self-supporting, suitable for use

dans le domaine des revêtements des meubles, et plus parti-  furniture coatings, and more particularly

culièrement dans le domaine automobile, consistant en un support rigidede nature polyoléfinique, revêtu, sans emploi d'adhésif, d'une ou plusieurs couches flexibles de finissage à base de polyoléfine comme des couches fibreuses, des  automotive, consisting of a polyolefin-type rigid carrier, coated, without the use of adhesive, of one or more flexible polyolefin-based finishing layers such as fibrous layers,

couches de mousse, des pellicules et analogues.  foam layers, films and the like.

On connait déjà des structures composées pour les meubles, obtenues en reliant ensemble, en utilisant des adhésifs, un support rigide tel qu'un contre-plaqué, du carton, des laminages en matière plastique, des tôles en métal, et autres à des étoffes, des tapis, des produits  Already known composite structures for furniture, obtained by connecting together, using adhesives, a rigid support such as a plywood, cardboard, plastic laminates, metal sheets, and other fabrics , rugs, products

mousse, et autres.foam, and others.

Cependant, la préparation de toutes ces structures composées, en plus de nécessiter une technologie longue, complexe et coûteuse, présente également de nombreux inconvénients en liaison avec le choix et l'application des  However, the preparation of all these composite structures, in addition to requiring a long, complex and expensive technology, also has many disadvantages in connection with the choice and application of

adhésifs par rapport aux couches à assembler.  adhesives compared to the layers to be assembled.

Par ailleurs, il n'est pas toujours possible d'obtenir ces structures à une grande variété de formes également complexes au moyen d'étirage et par dessus tout, d'obtenir une adhérence satisfaisante entre les couches assemblées, Il y a un autre inconvénient, en effet, dans la plupart des cas, il n'est pas possible de réutiliser  On the other hand, it is not always possible to obtain these structures from a wide variety of equally complex shapes by means of stretching and above all to obtain a satisfactory adhesion between the assembled layers. There is another disadvantage in fact, in most cases, it is not possible to reuse

(recycler) les déchets de traitement.  (recycle) treatment waste.

On a maintenant trouvé qu'il était possible de relier ensemble des plaques en polyoléfine avec d'autres couches flexibles, toujours à base de polyoléfines, au moyen d'un procédé simple, rapide, versatile et assez bon marché, en utilisant pression et chaleur et en éliminant l'emploi des adhésifs, afin d'obtenir ainsi des structures composées f présentant lue excellente adherence entre les couches et  It has now been found that it is possible to connect together polyolefin plates with other flexible layers, always based on polyolefins, by means of a simple, fast, versatile and fairly inexpensive process, using pressure and heat. and eliminating the use of adhesives, thereby obtaining compound structures having excellent adhesion between the layers and

o sont sensbibement maintenues les caractéristiques mécani-  o are sensibly maintained the mechanical characteristics

ques et esthétiques des couches individuelles servant à  and aesthetics of the individual layers used to

former la structure.to form the structure.

ainrsi, la présente invention a pour objet une façon d'obtenir ces structures composées en une seule opération o la lia:.son des couche.sles unes aux autres se produit pendant le stade d'extrusion de la plaque en polyoléfine  Accordingly, the present invention relates to a way of obtaining these composite structures in a single operation where the bonding of the layers to each other occurs during the extrusion stage of the polyolefin plate.

ou pendant sa mise en forme à la chaleur.  or during heat shaping.

La présente invention a pour autre objet d'obtenir des structures composées pouvant facilement être étirées  Another object of the present invention is to obtain compound structures that can easily be stretched

à la chaleur selon une grande gamme de formes.  to heat according to a wide range of shapes.

La présente invention a pour autre objet d'assurer la possibilité de recycler les déchets de traitement de  Another object of the present invention is to ensure the possibility of recycling the treatment waste of

ces structures.these structures.

- Ces objets et d'autres encore de l'invention sont atteints par une structure composée consistant en un support rigide comprenant une plaque de polyoléfine de 0,5-4 mm d'épaisseur, revêtue sur une face ou sur les deux, sans interposition d'adhésif, d'une ou plusieurs couches  These and other objects of the invention are achieved by a composite structure consisting of a rigid support comprising a polyolefin plate 0.5-4 mm thick, coated on one or both sides, without interposition. adhesive, one or more layers

flexibles à base de polyoléfine.Flexible polyolefin based.

Comme plaque en polyoléfine, on peut utiliser celles obtenues à partir de polypropylène formé principalement de macromolécules isotactiques ayant un indice de fusion j de 0,5-7,5, de polyéthúylène, de copolymèresthermoplastiques de propylène-éthylène ou leu-smélangez,et pouvant contenir des additifs traditionnels comme, par exemple, des pigments, des lubrifiants, des agents antistatiques, des agents  As the polyolefin plate, those obtained from polypropylene mainly consisting of isotactic macromolecules having a melt index of 0.5-7.5, polyethylene, propylene-ethylene copolymer copolymer or leu-meltblind, and can be used. contain traditional additives such as, for example, pigments, lubricants, antistatic agents,

retardant la combustion, des charges et analogues.  retarding combustion, fillers and the like.

v0 Les couches flexibles de revêtement peuvent être des tissus, des non tissés,.des tapis, des feutres, des produits mousse et des pellicules à base de polypropylène isotactique, de polyéthylène, de copolymères'hermoplastiques  The flexible coating layers may be fabrics, nonwovens, carpets, felts, foam products and films based on isotactic polypropylene, polyethylene, thermoplastic copolymers.

de p-royy-ène-étiylène ou leurs mélanges.  p-royy-ene-ethylene or mixtures thereof.

SY> Qn peut indiquer, comme étant particulièrement adapt.scorme couche de revêtement, les tissus et non tissés basés sur des fibres de polypropylène ayant un poids spécifique compris entre 250 g/m2 et 800 g/m2,la polyoléfine mousse, en particulier le polyéthylène réticul6 ayant une densité de 20-100 kg/m3 et une épaisseur de 2-10mm et  As a particularly suitable coating layer, the fabrics and nonwovens based on polypropylene fibers having a specific gravity of between 250 g / m 2 and 800 g / m 2, the polyolefin foam, particularly the crosslinked polyethylene having a density of 20-100 kg / m3 and a thickness of 2-10 mm and

des pellicules de polyoléfine de 100-500 p d'épaisseur.  polyolefin films 100-500 μm thick.

Le procédé pour la préparation des structures composées selon l'invention consiste à relier la plaque en polyoléfine, à l'état amolli, à la couche flexible ou aux  The process for the preparation of the compound structures according to the invention consists in connecting the polyolefin plate, in the softened state, to the flexible layer or to the

couches flexibles de revêtement, éventuellement superfi-  flexible layers of coating, possibly superficial

ciellement amollies, et à soumettre ensuite la structure  cially softened, and then submit the structure

complète à une pression ne dépassant pas 9,81 bars.  complete at a pressure not exceeding 9.81 bar.

Ce procédé peut être mis en oeuvre en suivant diverses méthodes différentes parmi lesquelles on peut citer: accouplement ou liaison continue sur le produit fondu extrudé, accouplement continu à la flamme, et accouplement lors de la mise en forme à la chaleur, ou combinaison des  This method can be implemented by following various different methods among which can be mentioned: coupling or continuous bonding on the extruded melt, continuous coupling to the flame, and coupling during heat shaping, or combination of

méthodes citées.methods mentioned.

L'accouplement continu sur le produit fondu extrudé est obtenu en amenant la plaque de support, telle qu'elle sort de l'étae d'extrusion, encore à l'état amolli, à travers les cylindres chauffés d'une calandre o est simultanément amenée la couche flexible à relier et o, grâce à une régulation appropriée (ajustement) de l'emprise entre les cylindres, est exercée sur les couches une légère  The continuous coupling on the extruded molten product is obtained by bringing the support plate, as it leaves the extrusion stage, still in the softened state, through the heated rolls of a shell or is simultaneously the flexible layer to be connected and o, thanks to appropriate regulation (adjustment) of the grip between the rolls, is exerted on the layers a slight

pression de compression.compression pressure.

L'accouplement continu à la flamme est obtenu par passage des couches à accoupler ou à relier ensemble par un tube de soufflage à plusieurs flammes alimenté en un gaz combustible ayant un pouvoir calorifique connu et développant une température constante, o la fusion superficielle des couches se produit à une température réglée par le taux  The continuous coupling to the flame is obtained by passing the layers to be coupled or connected together by a multi-flame blast tube fed with a combustible gas having a known calorific value and developing a constant temperature, where the superficial melting of the layers occurs. produced at a temperature set by the rate

d'alimentation des couches au tube.feeding the layers to the tube.

Les couches superficiellement fondues sont immédiate-  The superficially melted layers are immediately

ment amenées aixcylindresd'accouplement entre lesquels  shall be provided with a coupling cylinder between which

a lieu l'adhérence.takes place adhesion.

L'accouplement lors de la mise en forme à chaud est obtenu pendant la phase d'étirement de la couche flexible de finissage avec la plaque rigide de support apres amollissement préliminaire sur place au moyen d'un système  The coupling during hot forming is obtained during the stretching phase of the flexible finishing layer with the rigid support plate after preliminary softening on site by means of a system.

chauffant amovible approprié.removable heater suitable.

Dans la pratique réelle, seule la plaque de support,  In actual practice, only the support plate,

agencée entre la matrice et la contre-matrice d'une presse-  arranged between the matrix and the counter-matrix of a press-

à étirer o a déjà été placée la couche flexible, est chauffée sur l'une ou ses deux faces, ensuite les deux moitiés de moule sont tirées l'une contre l'autre à une  to stretch where the flexible layer has already been placed, is heated on one or both sides, then the two mold halves are pulled against each other at a

pression appropriée.appropriate pressure.

Par ce système, on obtient en-même temps l'accouple-  By this system, we obtain at the same time the coupling

ment des couches ainsi que l'étirement de la structure composée. Les structures composées-aisant l'objet de l'invention sont particulièrement adaptées-à une utilisation comme panneaux rigides de revêtement dans le domaine des meubles, i5 et-en particulier dans l'industrie automobile o on les utilise pour le rcvêtement des portières, des plafonds de carrosserie, du plancher.de l'habitacle et pour le  layers and the stretching of the composite structure. The composite structures having the object of the invention are particularly suitable for use as rigid covering panels in the field of furniture, and in particular in the automotive industry where they are used for the covering of doors, ceilings for the bodywork, the floor of the passenger compartment and for

revêtement du coffre à bagages.-luggage compartment cover.-

Pour illustrer l'invention sans la limiter, on donnera  To illustrate the invention without limiting it, we will give

ci-après quelques exemples.here are some examples.

Exemple 1. -Example 1. -

On a préparé une structure composée formée d'une plaque de polypropylène reliée à un tapis aiguilleté en fibree de polypropylène, cet accouplement étant effectué  A composite structure formed of a polypropylene plate connected to a needled polypropylene polypropylene carpet was prepared, this coupling being carried out

sur le produit de fusion extrudé de là plaque.  on the melt extruded from the plate.

A cette fin, on utilisa une extrudeuse à une ule vis avec-dispositif de dégazage, ayant un diamètre externe de 60 mm et une longueur égale à 50 D (D = diamètre) et pourvue d'une tête 'plate d'extrusion d'une longueur de  To this end, a single screw extruder with a degassing device was used, having an outer diameter of 60 mm and a length of 50 D (D = diameter) and provided with a flat extrusion head. a length of

700 mm.700 mm.

Dans cette extrudeuse, on introduisit un produit granulé de polypropylène, isotactique ayant un indice de fusion de 3, chargé de 40% en poids de poudre de talc', en maintenant une température d'extrusion de 2000C et une vitesse de rotation de la vis de 60 t/mn, A l'extrémité de sortie de la filière, on obtint une plaque de 2,- m d'épaisseur et de- 560 mm de large, qui fut alors transférée, à un état amolli, à la calandre d'accouplement. Dans la calandre, se composant de trois cylindres chauffés, le premier à 64 C, le second à 128 C et le troisième à 86 C, on amena continuellement, entre les premier et second cylindres de compression, un tapis aiguilleté de fibrcsayant un poids spécifique de 500 g/m2  In this extruder was introduced an isotactic polypropylene granulated product having a melt index of 3, loaded with 40% by weight of talc powder, maintaining an extrusion temperature of 2000C and a rotational speed of the screw. At the outlet end of the die, a plate 2 .mu.m thick and 560 mm wide was obtained, which was then transferred, in a softened state, to the calender. 'coupling. In the calender, consisting of three heated cylinders, the first at 64 C, the second at 128 C and the third at 86 C, there was continually brought between the first and second compression cylinders a needled mat of fibers having a specific weight 500 g / m2

fait en fibresde polypropylène à un titre de 17 d.tex.  made of polypropylene fibers at a rate of 17 d.tex.

La structure composée ainsi obtenue présentait une  The composite structure thus obtained presented a

épaisseur de 6,3 mm et un poids spécifique de 3,375 kg/m2.  thickness of 6.3 mm and a specific weight of 3.375 kg / m2.

La structure ainsi obtenue peut être utilisée soit telle quelle ou peut être transformée, par étirage à chaud, en un produit fini destiné à répondre, aussi bien du point  The structure thus obtained can be used either as it is or can be converted, by hot drawing, into a finished product intended to meet, both from the

de vue esthétique que fonctionnel, aux nécessités spécifi-  from an aesthetic and functional point of view, to the specific needs

ques du domaine automobile, c'eit-à-dire pour le revêtement du plancher interne, des portières, de l'étagère sous  automotive field, that is to say for the internal floor covering, the doors, the shelf under

la lunette arrière et analogues.the rear window and the like.

-k. Exemple 2.-k. Example 2

On a préparé une structure composée consistant en une plaque en polypropylène reliîeà un tapis aiguilleté en fibresde polypropylène, l'accouplement étant obtenu par  A composite structure consisting of a polypropylene plate connected to a needled polypropylene fiber mat was prepared, the coupling being obtained by

un processus de mise en forme à chaud ou thermo-formage.  a hot forming or thermoforming process.

A cette fin, on utilisa une machine d'étirage à chaud consistant en un moule, un contre-moule, deux cadres et  For this purpose, a hot stretching machine consisting of a mold, a counter mold, two frames and

un système de panneauxamoviblesde chauffage par infrarouge.  a system of movable panels of infrared heating.

Dans la pratique, sur l'un des deux cadres, agencés entre le moule et le contre-moule, on plaça un tapis aiguilleté en fibresde polypropylène de 500 g/m2, dont les fibres avaient un titre de 17 d.tex, et sur l'autre cadre, on plaça une plaque en polypropylène ayant les mêmes caractéristiques que celles de la plaque obtenue par  In practice, on one of the two frames, arranged between the mold and the counter mold, was placed a polypropylene fiber needled mat of 500 g / m 2, the fibers of which had a title of 17 d.tex, and on the other frame, a polypropylene plate having the same characteristics as that of the plate obtained by

extrusion selon l'exemple 1.extrusion according to Example 1.

Ensuite, les deux faces de la plaque furent chauffées au moyen des panneaux chauffantsà infrarouge, les amenant à 190 C. Alors, après enlèvement des panneaux chauffants, les deux moitiés de moule furent rapprochées, pour obtenir ainsi en une seule opération, à la fois l'accouplement de la plaque et du tapis aiguilleté en fibre.: t l'étirage. de la  Then, both sides of the plate were heated by means of the infrared heating panels, bringing them to 190 C. Then, after removal of the heating panels, the two mold halves were brought together, thus obtaining in one operation, at a time the coupling of the plate and the needled mat fiber: t stretching. of the

structure composéee.composite structure.

La structure composée ainsi obtenue présentait"ủne  The resulting composite structure presented "ủne

2aisseur de 6,3 mm et.un poids spécifique de 3,375 kgm2.  Thickness of 6.3 mm and a specific weight of 3.375 kgm2.

-; ExemiDe 3, -.-; ExemiDe 3, -.

On prépara mune structure composée consistant en une plaque de polypropylène, une couche intermédiaire en mousse.e polyéthylène réticulé et un tapis aiguilleté en fibre de polypropylène., A mEn répétant exactement les processus de l'exemple.1 -is en introduisant entre le premier et le second cylindre compression de la calandre, au lieu du-; tapis aiguilleté e fibres de polypropylène, une couche de polyéthylène xpansé et réticulé de 4 mm d'épaisseue'etd'une densité o30 kg/m3, on prépara une structure couplée de la plaque  A composite structure consisting of a polypropylene plate, an intermediate layer of cross-linked polyethylene foam and a polypropylene fiber needled mat was prepared by repeating exactly the processes of Example 1 -is, introducing between the first and second layers. and the second cylinder compression of the calender, instead of; polypropylene fiber needled mat, a layer of expanded and cross-linked polyethylene of 4 mm thick and a density of 30 kg / m 3, a coupled structure of the plate was prepared

e' du produit mousse...e 'of the foam product ...

La structure combinée. ainsi-obtenue à la sortie de la calandre fut alors chauffée du côté de la partie portant la couche de mousse jusqu'à la fusion superficielle  The combined structure. thus-obtained at the exit of the calender was then heated on the side of the part carrying the layer of foam until the superficial fusion

de la couche de mousse elle-mêr;e, et ensuite on la reliai.  of the foam layer itself, and then it was connected.

à un tapis aiguilleté en fibresde polypropylène pesant 500-g/m2 et dont les fibres présentaient un titre de  polypropylene fiber needled carpet weighing 500-g / m 2 and whose fibers had a

17 d.tex, au moyen de cylindres d'accouplement.  17 d.tex, by means of coupling cylinders.

La structure composée à trois couches ainsi obtenue, c'est-à-dire plaque/couche de mousse/tapis aiguilleté, présentait une épaisseur de 9,8 mn et un poids spécifique de 3,495 kg/m2. Cette structure en trois couches, grâce à.sa légèreté, son aphonicité et pour ses caractéristiques esthétiques imroarties à la surface textile, se révéla Do particulièrement adaptée à une utilisation pour revêtemen-t  The thus obtained three-layer composite structure, ie, foam plate / layer / needled mat, had a thickness of 9.8 min and a specific gravity of 3.495 kg / m 2. This three-layered structure, thanks to its lightness, its aphonicity and for its imroarized aesthetic characteristics on the textile surface, proved to be particularly suitable for use in upholstery.

dans l'industrie automobile.in the automotive industry.

Bien entendu l'invantion n'est nullement limitée aux modes de réalisation décrits qui n'ont été.donnés qu'à titre d'exemple, En particulier elle comprend tous les moyens constituant des équivalents technliques des moyens décrits ainsi que leurs combinaisons si celles-ci sont  Naturally, the invantion is in no way limited to the embodiments described which have been given only by way of example. In particular, it comprises all the means constituting technical equivalents of the means described as well as their combinations if those are

exécutées suivant son esprit et mises en oeuvre dans le cadre.  executed according to his spirit and implemented in the frame.

de la iprotection comme revendiquée.  of protection as claimed.

ii

Claims (7)

REVEND I CATI 0 N SCLAIM I CATI 0 N S 1. Structures composées, caractérisées en ce qu'elles se composent d'un support rigide formé d'une plaque en polyoléfine de 0,5-4 mm d'épaisseur et revêtue sur l'une ou ses deux faces, sans interposition d'un adhésif, d'une oU plusieurs couches flexibles à base de polyoléfine. -  Composite structures, characterized in that they consist of a rigid support formed of a polyolefin plate 0.5-4 mm thick and coated on one or both sides, without interposition of an adhesive, one or more flexible layers based on polyolefin. - 2. Structures selon la revendication 1, caractérisées en ce que la polyoléfine de la plaque précitée est choisie parmi des polyoléfines consistant prlncipalement en polypropylène à2. Structures according to claim 1, characterized in that the polyolefin of the aforementioned plate is chosen from polyolefins consisting mainly of polypropylene to maoromolécuJes lsotactiques,polyéthylène, copolymères thermo-  mechanics, polyethylene, thermo-copolymers plastiques de propylène-éthylène ou leurs mélanges.  propylene-ethylene plastics or mixtures thereof. 3. Structures selon la revendication 2, caractérisées en ce que la plaque précitée se compose d'un polypropylène  3. Structures according to claim 2, characterized in that the aforementioned plate consists of a polypropylene ayant un indice de fusion de 0,5-7,5.  having a melt index of 0.5-7.5. 4. Structuresselon l'une quelconque des revendications  4. Structure according to any one of the claims précédentes, caractérisées en ce que les couches de revête-  preceding, characterized in that the layers of coating ment précitées se composent de tissu ou de non tissé ayant un poids spécifique de 250-800 g/m2 et basés sur des fibres  These fabrics are composed of fabric or non-woven fabric with a specific weight of 250-800 g / m2 and based on de polypropylène isotactique.isotactic polypropylene. 5. Structures selon l'une quelconque des revendica-  5. Structures according to any one of the claims tions précédentes, caractérisées en ce que les couches de revêtement précitées se composent d'une couche mousse de polyoléfine ayant une densité de 20-100 kg/m3, et une  characterized in that the aforementioned coating layers consist of a polyolefin foam layer having a density of 20-100 kg / m 3, and a épaisseur comprise entre 2 et 10 mm.  thickness between 2 and 10 mm. 6. Strỏturesselon l'une quelconque des revendications  6. Stretches according to any one of the claims précédentes, caractérisées en ce que les couches de revête-  preceding, characterized in that the layers of coating ment précitées se composent de pellicules de polyoléfine  mentioned above consist of polyolefin films ayant 100-500 p d'épaisseur.having 100-500 p thick. 7. Procédé de préparation des structures composées  7. Process for preparing compound structures selon l'une quelconque des revendications précédentes,  according to any one of the preceding claims, caractérisé en ce qu'il consiste à relier une plaque amollie de polyoléfine à une ou plusieurs couches flexibles de polyoléfine, éventuellement superficiellement amollies, puis à soumettre toute la structure composée à une pression  characterized in that it comprises connecting a softened polyolefin plate to one or more flexible polyolefin layers, optionally superficially softened, and then subjecting the entire composite structure to pressure ne dépassant pas 9,81 bars.not exceeding 9.81 bar. ".: 2473415": 2473415 C. Procéd6 selon la revendi-cation 7, caractérise en ce-qu'à la sortie-de la tête d'extrusion ou de la filière, la plaque en polyoléfine précitée est reliée à une ou plusieurs couches flexibles-en les faisant passer entre des cylindres chauffés. c. Procédé selon la revendication 7, caractérisé en ce que la plaque de polyoléfine précitée, après chauffage préliminaire, est reliée à une ou plusieurs couches flexibles  C. Process according to claim 7, characterized in that at the exit-of the extrusion head or the die, the aforementioned polyolefin plate is connected to one or more flexible layers-by passing them between heated cylinders. c. Process according to Claim 7, characterized in that the aforementioned polyolefin plate, after preliminary heating, is connected to one or more flexible layers dans un dispositif de moulage à la chaleur.  in a heat molding device. ::
FR8100221A 1980-01-11 1981-01-08 COMPOUND STRUCTURES BASED ON RIGID POLYOLEFIN PLATES COATED WITH FLEXIBLE POLYOLEFIN LAYERS AND PROCESS FOR PREPARING THE SAME Granted FR2473415A1 (en)

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IT19158/80A IT1129661B (en) 1980-01-11 1980-01-11 COMPOSITE STRUCTURES BASED ON RIGID POLYOLEFINIC SHEETS COATED WITH POLYOLEFINIC FLEXIBLE LAYERS

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FR2473415B1 FR2473415B1 (en) 1984-11-16

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ES498412A0 (en) 1983-01-01
ES8301750A1 (en) 1983-01-01
IT1129661B (en) 1986-06-11
GB2067135A (en) 1981-07-22
DE3100682A1 (en) 1981-11-26
IT8019158A0 (en) 1980-01-11
GB2067135B (en) 1984-04-04
FR2473415B1 (en) 1984-11-16

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